为了解副猪嗜血杆菌感染猪后的组织分布和排毒情况,应用建立的SYBR Green Ⅱ荧光定量PCR检测方法,分析了副猪嗜血杆菌在猪各组织的分布及其在血液、鼻拭子中载量的变化情况。结果显示:高剂量感染组出现明显的临床症状,且平均体温高于其...为了解副猪嗜血杆菌感染猪后的组织分布和排毒情况,应用建立的SYBR Green Ⅱ荧光定量PCR检测方法,分析了副猪嗜血杆菌在猪各组织的分布及其在血液、鼻拭子中载量的变化情况。结果显示:高剂量感染组出现明显的临床症状,且平均体温高于其他各组1~2℃;对试验组各组猪内脏组织进行检测发现,副猪嗜血杆菌主要集中在气管、扁桃体、颌下淋巴结、肺等组织中,不同组织器官中的细菌载量也存在着一定的差异;血液中并未检测到副猪嗜血杆菌,但在感染的8~20 d高剂量组鼻拭子中副猪嗜血杆菌的载量显著高于其他组。本文研究了副猪嗜血杆菌感染仔猪后的临床症状和体外排毒情况,为以后副猪嗜血杆菌的防治及致病机理研究奠定一定理论基础。展开更多
To contain the rapid and global spread of SARS-CoV-2, it is essential to develop an accurate and sensitive test system to address pandemic bottlenecks, simplified sample collection, and no sample prep. While meeting t...To contain the rapid and global spread of SARS-CoV-2, it is essential to develop an accurate and sensitive test system to address pandemic bottlenecks, simplified sample collection, and no sample prep. While meeting the demand of testing large populations, the miniaturized volume of assay reagents and offering rapid results is the need in such scenarios. Moreover, in view of the reports of co-infections and overlapping symptoms of Influenza caused by Influenza A or Influenza B, and COVID-19 caused by SARS-CoV-2, a test system with three targets can be supportive for accurate clinical diagnosis. In this presentation, we evaluated the performance of a test comprising Microchip RT-PCR Influenza and COVID-19 Detection System for identifying these three viral pathogens in nasal swabs and saliva specimens. A rapid and simplified total nucleic acid extraction method was developed and validated for the reliable, high-throughput simultaneous detection of respiratory viruses causing Influenza (type A and type B viruses) and COVID-19 (SARS-CoV-2 virus) using the microchip-based AriaDNATM platform deriving the name ABC Test. The test system was evaluated using 81 nasal swab samples, 77 clinical saliva samples, 5 blind CAP reference samples, and RNA standards. The limit of detection (LoD) was assessed using SARS-CoV-2, Influenza A, and Influenza B RNA standards. The multiplex ABC Test microchip displayed LoD of 14 copies/μL for SARS-CoV-2 and approximately 26 copies/μL for Influenza A, and 140 copies/μL for Influenza B, respectively. The ABC Test offers rapid multiplex one-step RT-PCR in 32 minutes for 45 cycles as the miniaturized reaction of 1.2 μL offering a highly sensitive, robust, and accurate assay for the detection of Influenza A/B, and SARS-CoV-2.展开更多
文摘为了解副猪嗜血杆菌感染猪后的组织分布和排毒情况,应用建立的SYBR Green Ⅱ荧光定量PCR检测方法,分析了副猪嗜血杆菌在猪各组织的分布及其在血液、鼻拭子中载量的变化情况。结果显示:高剂量感染组出现明显的临床症状,且平均体温高于其他各组1~2℃;对试验组各组猪内脏组织进行检测发现,副猪嗜血杆菌主要集中在气管、扁桃体、颌下淋巴结、肺等组织中,不同组织器官中的细菌载量也存在着一定的差异;血液中并未检测到副猪嗜血杆菌,但在感染的8~20 d高剂量组鼻拭子中副猪嗜血杆菌的载量显著高于其他组。本文研究了副猪嗜血杆菌感染仔猪后的临床症状和体外排毒情况,为以后副猪嗜血杆菌的防治及致病机理研究奠定一定理论基础。
文摘To contain the rapid and global spread of SARS-CoV-2, it is essential to develop an accurate and sensitive test system to address pandemic bottlenecks, simplified sample collection, and no sample prep. While meeting the demand of testing large populations, the miniaturized volume of assay reagents and offering rapid results is the need in such scenarios. Moreover, in view of the reports of co-infections and overlapping symptoms of Influenza caused by Influenza A or Influenza B, and COVID-19 caused by SARS-CoV-2, a test system with three targets can be supportive for accurate clinical diagnosis. In this presentation, we evaluated the performance of a test comprising Microchip RT-PCR Influenza and COVID-19 Detection System for identifying these three viral pathogens in nasal swabs and saliva specimens. A rapid and simplified total nucleic acid extraction method was developed and validated for the reliable, high-throughput simultaneous detection of respiratory viruses causing Influenza (type A and type B viruses) and COVID-19 (SARS-CoV-2 virus) using the microchip-based AriaDNATM platform deriving the name ABC Test. The test system was evaluated using 81 nasal swab samples, 77 clinical saliva samples, 5 blind CAP reference samples, and RNA standards. The limit of detection (LoD) was assessed using SARS-CoV-2, Influenza A, and Influenza B RNA standards. The multiplex ABC Test microchip displayed LoD of 14 copies/μL for SARS-CoV-2 and approximately 26 copies/μL for Influenza A, and 140 copies/μL for Influenza B, respectively. The ABC Test offers rapid multiplex one-step RT-PCR in 32 minutes for 45 cycles as the miniaturized reaction of 1.2 μL offering a highly sensitive, robust, and accurate assay for the detection of Influenza A/B, and SARS-CoV-2.
